Coolant change when bulletproofing
So i'm installing my BPD oil cooler kit this weekend due to a 30* delta. My question is when I drain the coolant from the lower radiator hose, will enought drain out to put some CAT ELC in there or do I still have to flush it out. I have Ford gold in it now. Will mixing a little of that in, like whats left in the block affect the CAT coolant? Will pulling the t-stat and runing water from a hose through it work? Or do I need a bunch of distilled water? Thanks guys.